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    5.7 / 8 speed with 3.21 gears need info

    I have this combo (except with pentatar 3.6). You'll be fine with the eight speed. In my opinion, the 8 speed transmission makes the final drive ratio less relavant than it used to be. I've towed a 18 foot (inboard/outboard) boat with 6 six people in the cab. Engine runs around 4K rpms up...
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